 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.externaltools.internal.program.launchConfigurations;


 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.jobs.Job;
 import org.eclipse.debug.core.DebugEvent;
 import org.eclipse.debug.core.DebugPlugin;
 import org.eclipse.debug.core.IDebugEventSetListener;
 import org.eclipse.debug.core.ILaunchConfiguration;
 import org.eclipse.debug.core.model.IProcess;
 import org.eclipse.debug.ui.RefreshTab;
 import org.eclipse.ui.externaltools.internal.model.ExternalToolsPlugin;

 /**
  * Refreshes resources as specified by a launch configuration, when
  * an associated process terminates.
  */
 public class BackgroundResourceRefresher implements IDebugEventSetListener {

     private ILaunchConfiguration fConfiguration;
     private IProcess fProcess;
     
     public BackgroundResourceRefresher(ILaunchConfiguration configuration, IProcess process) {
         fConfiguration = configuration;
         fProcess = process;
     }
     
     /**
      * If the process has already terminated, resource refreshing is done
      * immediately in the current thread. Otherwise, refreshing is done when the
      * process terminates.
      */
     public void startBackgroundRefresh() {
         synchronized (fProcess) {
             if (fProcess.isTerminated()) {
                 refresh();
             } else {
                 DebugPlugin.getDefault().addDebugEventListener(this);
             }
         }
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.debug.core.IDebugEventSetListener#handleDebugEvents(org.eclipse.debug.core.DebugEvent[])
      */
     public void handleDebugEvents(DebugEvent[] events) {
         for (int i = 0; i < events.length; i++) {
             DebugEvent event = events[i];
             if (event.getSource() == fProcess && event.getKind() == DebugEvent.TERMINATE) {
                 DebugPlugin.getDefault().removeDebugEventListener(this);
                 refresh();
                 break;
             }
         }
     }
     
     /**
      * Submits a job to do the refresh
      */
     protected void refresh() {
         Job job= new Job(ExternalToolsProgramMessages.BackgroundResourceRefresher_0) {
             public IStatus run(IProgressMonitor monitor) {
                 try {
                     RefreshTab.refreshResources(fConfiguration, monitor);
                 } catch (CoreException e) {
                     ExternalToolsPlugin.getDefault().log(e);
                     return e.getStatus();
                 }
                 return Status.OK_STATUS;
             }
         };
         job.schedule();
     }
 }

